# try:
#     a = float(input('请输入被除数：'))
#     b = float(input('请输入除数：'))
#     c = a / b
#     print('商为：', c)
# except ZeroDivisionError:
#     print('除数不能为0！')
# except ValueError:
#     print('被除数和除数应为数字类型!')

# fileName = 'birthday.txt'
# try:
#     file = open(fileName, 'r')
# except FileNotFoundError:
#     print(fileName, '文件不存在')
# else:
#     print(fileName, '文件有', len(file.readlines()), '行')
#     file.close()

fileName = 'integer.txt'
try:
    file = open(fileName, 'a')
    data = int(input('请输入一个整数：'))
    file.write(str(data))
except Exception as e:
    print(e)
finally:
    print('关闭文件')
    file.close()